PM81674: EL EXPRESSIONS ARE NOT EVALUATED WHEN PRECEDED BY TWO BACKSLASHES

8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• Error Description?
  EL Expressions are not being evaluated if the expression is in
  this format:
  \\${10+20}
  
  Having two backslashes before the EL Expression should result
  in the expression being evaluated, however it is not.
  

Local fix

• Local Fix￘
  none
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Version    *
  *                  7.0, 8.0 and 8.5 users of JavaServer Pages  *
  *                  (JSP).                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: An EL Expression in a JSP file is not   *
  *                      evaluated if the expression is          *
  *                      preceded by two backslashes ("\\").     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  If two backslashes are positioned before an EL expression, it
  is considered to be escaped and the expression will not be
  evaluated.
  For example, an expression such as this:
  <test:mytag myAttr="\\${1+1}" />
  will result in the rendered value of the myAttr attribute to
  be "\${1+1}". The correct behavior is that the expression is
  evaluated and the rendered value is "\2".
  

Problem conclusion

• The JSP Container code was modified to properly evaluate
  expressions when they are preceded by two backslashes.
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 7.0.0.29, 8.0.0.6, and 8.5.0.2.  Please refer to the
  Recommended Updates page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PM70967

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  LIBERTY PROFILE

• Fixed component ID

  5724J0814

Applicable component levels

• R850 PSY

     UP